Ankle Eversion
Definition
The movement of the sole of the foot turning outward, away from the midline. A component of pronation. Normal eversion range is approximately 15-25 degrees. Measured with the ankle in neutral position. Eversion strength (peroneal function) is essential for lateral ankle stability.
Clinical Significance
Eversion strength and ROM are the primary defense against lateral ankle sprains. Peroneal weakness (the muscles that produce eversion) is one of the strongest predictors of recurrent ankle sprains. In the kinetic chain context, excessive resting eversion contributes to medial arch collapse, tibial internal rotation, and knee valgus. The balance between inversion and eversion ROM determines subtalar joint behavior under load.
How AKMI Assesses This
AKMI measures eversion ROM bilaterally and tests peroneal strength through resisted eversion. The measurement is correlated with pronation tendency, navicular drop, and lateral ankle stability history.
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A biomechanical assessment measures ankle eversion and its relationship to the rest of your structural chain. 18 tests, objective data, personalized programming.